from __future__ import annotations

from typing import Any
class SCREAMING_SNAKE_CASE_		:







   def __init__(     self						:						Optional[int]   ,   lowerCamelCase_						:						int = 6				):





    """simple docstring"""


    UpperCamelCase			  =      None
    UpperCamelCase			  =      None
    self.create_linked_list(lowerCamelCase_				)







   def 						lowerCamelCase_	(     self						:						Optional[int]   ,   lowerCamelCase_						:						int				):





    """simple docstring"""


    UpperCamelCase			  =      Node()
    UpperCamelCase			  =      current_node
    UpperCamelCase			  =      current_node
    UpperCamelCase			  =      current_node
    for _ in range(1   ,   lowerCamelCase_				):
     UpperCamelCase			  =      Node()
     UpperCamelCase			  =      current_node
     UpperCamelCase			  =      previous_node
     UpperCamelCase			  =      current_node
    UpperCamelCase			  =      self.front
    UpperCamelCase			  =      previous_node







   def 						lowerCamelCase_	(     self						:						Union[str, Any]				):





    """simple docstring"""


    return (
        self.front == self.rear
        and self.front is not None
        and self.front.data is None
    )







   def 						lowerCamelCase_	(     self						:						Union[str, Any]				):





    """simple docstring"""


    self.check_can_perform_operation()
    return self.front.data if self.front else None







   def 						lowerCamelCase_	(     self						:						Tuple   ,   lowerCamelCase_						:						Any				):





    """simple docstring"""


    if self.rear is None:
     return

    self.check_is_full()
    if not self.is_empty():
     UpperCamelCase			  =      self.rear.next
    if self.rear:
     UpperCamelCase			  =      data







   def 						lowerCamelCase_	(     self						:						Dict				):





    """simple docstring"""


    self.check_can_perform_operation()
    if self.rear is None or self.front is None:
     return None
    if self.front == self.rear:
     UpperCamelCase			  =      self.front.data
     UpperCamelCase			  =      None
     return data

    UpperCamelCase			  =      self.front
    UpperCamelCase			  =      old_front.next
    UpperCamelCase			  =      old_front.data
    UpperCamelCase			  =      None
    return data







   def 						lowerCamelCase_	(     self						:						Tuple				):





    """simple docstring"""


    if self.is_empty():
     raise Exception("""Empty Queue"""				)







   def 						lowerCamelCase_	(     self						:						Union[str, Any]				):





    """simple docstring"""


    if self.rear and self.rear.next == self.front:
     raise Exception("""Full Queue"""				)





class SCREAMING_SNAKE_CASE_		:







   def __init__(     self						:						List[Any]				):





    """simple docstring"""


    UpperCamelCase			  =      None
    UpperCamelCase			  =      None
    UpperCamelCase			  =      None


if __name__ == "__main__":
     import doctest

     doctest.testmod()

def 			lowercase(	UpperCamelCase_							,					UpperCamelCase_							,					UpperCamelCase_       )		->	list:







 '''simple docstring'''
 UpperCamelCase			  =      len(UpperCamelCase_       )
 UpperCamelCase			  =      [[0] * n for i in range(UpperCamelCase_       )]
 for i in range(UpperCamelCase_       ):
  UpperCamelCase			  =      y_points[i]

 for i in range(2							,					UpperCamelCase_       ):
  for j in range(UpperCamelCase_							,					UpperCamelCase_       ):
   UpperCamelCase			  =      (
       (xa - x_points[j - i + 1]) * q[j][i - 1]
       - (xa - x_points[j]) * q[j - 1][i - 1]
   ) / (x_points[j] - x_points[j - i + 1])

 return [q[n - 1][n - 1], q]


if __name__ == "__main__":
     import doctest

     doctest.testmod()
